Defend Earth from destruction from the onslaught of the Xidus fleet. Your state-of-the-art ship is equipped with a limitless supply of ammunition, and in addition has missiles, bombs, and a retractable claw used for retrieving ship upgrades during the heat of battle. Initially, a shareware game, version 1.5 (DOS) was released as freeware in 1999 and a Windows version with new Sound FX and Music was released for purchase.